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3.8.2. AC/DC Drive Object Instance Attributes
Attribute
ID
Name
Data
Type
Access
Rules
Description
Default
Value
1
Number of Attributes
USINT
Get
Number of Attributes supported
19
2 Attribute
List
USINT
(ARRAY)
Get
List of Attributes supported
-
3 At
Reference
BOOL Get
1 = Drive actual at reference (speed or
torque reference) based on mode
-
4 Net
Reference
BOOL Get/Set
Requests torque or speed reference to
be local or from network.
0 = Set Reference not DN Control
1 = Set Reference at DN Control
Note that the actual status of torque or
speed reference is reflected in atrribute
29, RefFromNet.
-
6 Drive
Mode
USINT Get
0 = Vendor specific mode
1 = Open loop speed (Frequency)
2 = Closed loop speed control
3 = Torque control
4 = Process control (e.g. PI)
5 = Position control
-
7 Speed
Actual
INT Get
Actual drive speed
(best approximation)
Units: min
-1
-
8 Speed
Reference
INT Get/Set
Speed reference
Units: min
-1
-
9 Current
Actual
INT Get
Actual motor phase current
Units: 100mA
-
10 Current
Limit
INT Get/Set
Motor phase current limit
Units: 100mA
-
11 Torque
Actual
INT
Get
Actual torque
Units: Nm
-
15 Power
Actual
INT
Get
Actual output power
Units: W/2
PowerScale
-
18 Accel
Time
UINT Get/Set
Acceleration time
Time from 0 to High Speed Limit
Units: ms/2
TimeScale
-
19 Decel
Time
UINT Get/Set
Acceleration time
Time from 0 to High Speed Limit
Units: ms/2
TimeScale
-
20
Low Speed Limit
UINT
Get/Set
Minimum speed limit
Units: min
-1
-
21
High Speed Limit
UINT
Get/Set
Maximum speed limit
Units: min
-1
-
26 Power
Scale
SINT Get
Power scaling factor.
0
28 Time
Scale
SINT Get/Set
Time scaling factor.
0
29
Ref From Net
BOOL
Get
Status of torque/speed reference
0 = Local torque/speed reference
1 = DeviceNet torque/speed reference
-
46
Drive on Hours
DINT
Get
Number of hours
Units: h
-
3.8.3. AC/DC Drive Object Common Services
Supported
Service
Code
Service Name
Class
Instance
Description of Service
0x0E Get_Attribute_Single
Yes
Yes
Returns the contents of the specified attribute.
0x10 Set_Attribute_Single
N/A
Yes
Modifies the value of the specified attribute.
3.8.4. AC/DC Drive Object Specific Services
AC/DC Drive Object provides no object specific services for the slave.